What Fingerprint scanner is?

In today's era fingerprint scanner is not only exclusive to the top-end security and government organizations, butnow, you can even find them on smartphones, where they allow the user to unlock their smartphone device with their fingerprints.
As the technology spread its wings now biometric fingerprint scanner are also available on the actual display, there are many mobile devices where fingerprint scanner are on their mobile display where the user just touch the screen and unlock their device.
There are 3 widely used fingerprint scanners, that i am damn sure that a layman is aware of:
1) Optical Scanner: Optical Scanner is the first technology when fingerprint scanner is invented. This technology using various type of algorithm to identify the pattern of skin's surface. It using led to highlight the fingers while it's pressed against the glass plate.
2) Capacitive Scanner: Capacitive Scanner is quite technical terms but a layman is already using this scanner in their routine life, it's commonly used in smartphones. Capacitive scanner does not create traditional fingerprint image.
3) Ultrasonic Scanner: Ultrasonic Scanner works differently than other two, it generates ultrasonic pulse while pressing the finger against the fingerprint sensor. Fingerprint identification is an integral part of the biometric recognition.
Apart from mobile devices, there are separate devices for especially scanning the fingerprints to identify the person's identity.
Major banks, online wallets, government organizations, and telecom service providers are using ekyc device which linked to the aadhaarcard, so that from one fingerprint they can get whole information about a particular person or identity. These devices are also known as aadhaar enabled biometric fingerprint device.

And also visit: https://www.mantratec.com/products/Fingerprint-Sensors